LevoxylÂ® (levothyroxine sodium) is a thyroid medication approved for the treatment of an underactive thyroid. It is available by prescription only and comes in the form of a tablet that is taken once a day. There are many strengths of Levoxyl available (12 total), ranging from 25 mcg to 300 mcg. Since different people have varying degrees of hypothyroidism and respond to medications differently, there is no standard Levoxyl dosage. The drug is not a one-size-fits-all medication, and doses must be individualized for each person.
Making the world better, one answer at a time. DNA and RNA are polymers. Collectively, DNA and RNA are called nucleic acids. The subunits of nucleic acids are called nucleotides. Nucleotide monomers form nucleic acid polymers.A nucleotide has 3 parts to it: a phosphate group, a sugar (ribose in RNA and deoxyribose in DNA), and a base (Adenine, Guanine, Cytosine, Thymine or Uracil-Thymine is found only in DNA and Uracil is found only in RNA, but the other 3 bases may be found in either.).NA is built of billions of subunits called nucleotides.  Nucleotides are organic compounds that are made up of a nitrogenous  base, a sugar, and a phosphate group.
A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of these chains is known as a DNA chain, or a DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together (Figure 4-3).As we saw in Chapter 2 (Panel 2-6, pp.NA was known to be a long polymer composed of only four types of subunits, which resemble one another chemically. Early in the 1950s, DNA was first examined by x-ray diffraction analysis, a technique for determining the three-dimensional atomic structure of a molecule (discussed in Chapter 8).